(Askeri) DÜRBÜN İÇ TAKSİMATI: Bir optik aletin odak noktasına konmuş olan ve cisimlerin büyüklüğünü, mesafesini, cihetini veya mevkiini belirlemekte kullanılan ölçü taksimatı veya işaretler. Bu taksimat genel olarak cam üzerine işlenir ve bütün merceğe denir. İç taksimat, nişan dürbünlerinde ve diğer ateş idare aletlerinde kullanılır. Ayrıca bakınız: "graticule"
A crosshair or reticle is a shape superimposed on an image that is used for precise alignment of a device. Crosshairs are most commonly a "+" shape, though many variations exist, including dots, posts, circles, and chevrons. Most commonly associated with telescopic sights for aiming firearms, crosshairs are also common in optical instruments used for astronomy and surveying, and are also popular in graphical user interfaces as a precision pointer. The crosshair was invented by Robert Hooke, and dates to the 17th century